Barrel-recoil gun with wedge breech-block.



PATENTED JAN. 29, 1907.

M. HERMSDORF. BARREL RBOOIL GUN WITH WEDGE BRBEUH BLOCK.

APPLIOATION FILED JAN. 15.1906.

Tmi 1 it. Jin

it. i

stares PATENT orrron.

EESD HF, OF ESSEN-ON-THE-RUHl-t, GERMANY, ASSIGNOR T KEEP? AKTIENGESELLSCHAFT, OF ESSEN-OY-TliE-RUHR,

GUN WlTH WEDGE BREECH-BLOCEQ.

Specification of Letters Patent.

Patented Jan. 29, 1907'.

Application filed January 15,1906. Serial No. 296,207.

To 02/] lF/H/Hb if nut concern.-

on that 5., MA l'lERMSDORF, a ,Fnzpere cf Germany, and a e-Rui r. Germany,

-Blocks, of which the follow- .i'liitfitlill'l.

"nt invention has for its object to -gunssuch, for instance, as .n *h-hloel; guns described in the United 11m; s patent to ilermsdorf, No. $13,530, of M... 2, lll"" \vltll means for securing the lHGtClid'lOCli in open position PIllEltCDtiOllttl closing.

witl a n o -recoiling part of the gun in such a manner til at the drum is rota ted in one direction inthi. recoi f the gun and in the other di 311c returi'i or forward 1novegun. An arm carried by the of the drum, due to the recoil movement of the gun. so as to fl-Cl'ililli to partake of the oppoit non of i1edrunt, due to the return or nioveitient of the gun. During the (iii? to the rearward movement of eech of course, heing closed, 5 .pft against rotation under tucrce of the spring. and consequently iut upon this spring. hen the 1 e drum, he relative posift and the drum, which rn si i or ten 0. are

the sning connecting them, are n'zaintained hy the holt, so that W11. in rotates under the forward me gun not onlv this spring tc '13 ed, hut rotation is imparted 5 t e or. it through tl c holt in a difrecti'in to on 41 the hr 1* l -locl. which the forward the breechis full acciiiniplishcd thlt movement ot the gun.

block open and the spring under tension in the direction of rotating the crank-shaft to close the breech-block it is only necessary to release the bolt and permit the crank-shaft to rotate under the action of the spring, while the drum remains stationary. This release of the bolt has heretofore been effected by the act of inserting the cartridge in the chamber of the gun.

It has been found that in guns constructed as above described there is a slight reaction at the end of the forward or return movement of the gun-barrel, which causes a slight rotation of the parts, including the crank-shaft for raising the lueeclrblock, with the result that the breech-block interferes momentaril v with the proper extraction of the shell.

The object of my present invention is to overcome this disadvantage by 111ahingiti1npossible for the crank-shaft to receive any 1'0- tar v movement during this reaction.

In the annexed drawings, which show an example of nrv invention as used in a gun having a vertical-wedge breeclrhlock and swinging ejector, (though I do not limit the application of my invention to this type of guns,) Figure 1 is a side view, partly in section, of the part of the gun on which my invention is used. The parts are shown in the position in which the breech-block is opened. Fig. 2 is a section. on line 2 2, Fig. 1, seen from the left. Fig. 3 is a section on line 3 3, Fig. 2. seen from above; and Fig. 4 is a detail view.

The device for opening and closing the breech-block corresponds in all essential points to that shown in the aforesaid patent, and therefore only a short description will be given thereof in the following: The drum J which is connected with the cradle B, Fig. 1, by means of the draw-bar K, is rotatably mounted on the shaft G, Figs. 1 and 3, of the hand-lever H and the lifting-crank, (not shown in the drawings,) which engages with the breech-block D, Fig. 1. The spring M, Figs. 1 and 3, for opening and closing the breech-block, connects the drum J with the shaft G in such a manner that tension is imparted to the spring when the drum turns during the recoil. A spring-pressed bolt N is provided in an arm 7i of tlte hand-lever H, which engages the wall i, Fig. 1, of the groove i in drum J for holding the spring M Between the shaft G and the breech A.

a detent is inserted. One part of this detent is formed by a lateral boss n Figs. 1 and 2, 0n the bolt N, for which a guide-slot 7L2, Figs. 1 and 3, is provided in the arm h of the lever H. The boss n is provided with an interlock-face n and an inclined face a The other part of this detent consists of a stop S, (see also Figs. 1 and 4,) actuated by a spring s and provided with a head 8 It is slidably but non-rotatably arranged. in a recess a, Fig. 2, in the breech A, and its head is provided with an interlock-face s and an inclined face 5 .The spring .9 tends to hold the stop S in the position shown in the drawings, in which the stop lies against the drum J and the head 8 projects outwardly from the breech. The engaging boss n is arranged in such a manner that the head 8 of the stop S is situated in the path of the boss n of the bolt N when the latter engages with the groove "L and that the detent S n assumes the arresting .position shown in the drawings when the breech-block is wide open.

When the recoil of the gun-barrel has come to an end, the hand-lever H and the locking device N i are in the position indicated in dotted lines in the drawings, and the bolt engages with the groove 2. Upon the return of the gun-barrel the drum J is rotated in the direction of the arrow .2, Fig. 1, by means of the draw-bar K, and the drum carries the hand-lever H along with it through the medium of the interlocking de vice N i. While the hand-lever moves the breech-block D downwardly through the medium of the shaft G and the lifting-crank,

the ejector ejects the empty cartridge-case, so that the notch 77. of the bolt N, as de* scribed in the Patent No. 788,530, can enter into engagement with the sear r of the lever B when the hand-lever H reaches the position shown in full lines. Shortly before the turning movement of the h and-lever H and the downward movement of the breech-block are completed the inclined face it on the boss n of the bolt N comes into engagement with the inclined face s on the head .9 of the bolt S, and while the lever H makes the last part of its rotation the stop S is forced into the recess (1 against the action of the spring 8. At the moment the lever H has completed its rotation and opened the breechblock fully the boss n releases the detent S and the spring 8 causes the head 8 to move forwardly over the cam if. The device S n is then in the interlocked position and prevents upward movement of the breech-blo ck,

.which strives to turn ti which movement would disturb the ejection of the cartridge-case. If the interlocking device S n were dispensed with, upward movement of the breech-block would take place when the gun-barrel recoils a short dis tance, due to the reaction of a shock at the end of the return movement. In such case the draw-bar K turns the drum J in the opposite direction to the arrow 2, 1, thereby imparting additional tension to the spring M,

e shaft G in the di- .ch-block. .dcd, tlte lever R is rection of closing L118 When the gun lo turned through the mlium of the ejector and the shaft G, and t .e scar r of the lever R withdraws the bolt N from the groove of the drum J. The belt N consequently becomes diseng god from the shoulder i and the boss 77/ becomes diseng l from the l l ...e hand-lever head .9" of the stop S, w

H and ti haft G are released. so as to turn in the (Li .cti n of t e a ow 2, Fur 1, under tiC action of k M. The lifting-crank then effects t...e closing of the breech-block.

Havithus described my invention, what I claim as new therein is follows:

1. in a gun of the character described, the combination with the gun-barrel and the breech-closing mechanism, of means located on the gun-barrel and cooperating with the breech-closing mechanism for positively locking the breech-closing mechanism against recoil due to the arrest of the gun-barrel at the iimit of its forward movement.

2. in a gun of the character described, the combination with the gun-b arrel and the means for automatically closing the breech, of a stop located on the gun-barrel and coop erating with said means for positively looking the breech-closing means against recoil due to the arrest of the gunb arrel at the limit of its for' ard movement.

3. in a gun of the character described, the combination with the gun-b arrel and the means for automaticaliy closing the breech, of stop located on the gun-barrel and cooperating with said means for positively looking the breech-closing means against recoil due to the arrest of the gun-barrel at the limit of its forward movement, and means for releasing said step at will.

4. In combination with agun having abarrel, a breech-block, a rotating part through which the breech-block is closed and means through which rotation of said part is induced during movement incident to recoil, of means located on the gun-barrel and cooper ating with. said rotating part for positively locking said part against recoil due to the arrest of the gun-barrel at the limit of its forward movement, andv means for releasing the rotating part from said locking means.

5. in a gun of the character described, the

combination of the crank-shaft for closing the shaft through the medium of aspring and receiving movement from the recoil of the gun i I carried by the crank-shaft having a bolt to impart tension to the spring in the diree tion of closing the breech-block, :1 (rank-arm carrying a bolt for locking the crank-shaft and drum against relative movement during the return of the gun-barrel, and importing opening movement to the breech-bloek in consequence of the interlock between the crank-shaft and drum, and a stop intereeptj 1 mg movement of the crank-shaft, which preing the closing movement of the erenlt-sl'ia'ft through. the medium of the bolt 1 said bolt being reie'nsed from said step by the not of Withdrznving the bolt from its engagement With the drilfil. 7' M 6. In a gun having barrelrecoil, the combination of the breech-block, the crank-shaft through which the breech-block is opened and closed, a drum rotatebl v mounted upon crank-shaft, a drew-bar connecting the drum I to e non-recoiling part of the gun and through. Which rotation 18 imparted to the drum, during recoil and putting tension on the spring which tends to rotate the crank-shaft in the direction oi closlng the breech-block, an arm which engages with the drum at the end of the rotor movement due to the recoil of the gun-b errel and causing the crank-shaft to ro tote with the drum in the direction of opening the breeeh-block during the return or forward movement of the gun-barrel, a stop past which the bolt snaps at the end of the open vents movement of the crank-shat t in the direction of closing under the reaction of the gun-barrel at the end of its forward move ment ain'l'nTseaTr located in position to engage the bolt at the end of the opening movement of the breech-block and adapted to \vithdrmv the bolt from engagement both with the stop and the drum to permit the crank-shaft to rotate under the tension of the spring and close the breech-block.

The foregoing specification signed at Dusseldorf this 30th day of December, 1905.

MAX HERMSDORF. In presence of WILLIAM EssENWEIN, PETER LIEBER. 

